Operations By Segment (Parenthetical) (Detail) (Nonvoting Equity Securities, Boise Cascade Holdings, L.L.C., USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Nonvoting Equity Securities \| Boise Cascade Holdings, L.L.C.
Segment Reporting Information [Line Items]
Dividend income from investment in Boise Cascade Holdings, L.L.C.	$ 2.1	$ 1.0	$ 4.1

Amount of dividend income on nonoperating securities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.7(a))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Name:	us-gaap_InvestmentIncomeDividend
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration